Stop-motion for looms.



A. KEAN.

STOP MOTION FOR LOOMS. APPLICATION FILED 116114, 1912.

Patented July 15, 1913.

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I A. KBAN.

STOP MOTION FOR LOOMS.

APPLICATION FILED NOV. 14, 1912.

Patented July 15, 1913.

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UNITED STATES PATENT QFFICE.

ARTHUR KEAN, OF BOSTON, MASSACHUSETTS.

STOP-MOTION FOR LOOMS.

T 0 all whom it may concern Be it known that I, ARTHUR KEAN, of Boston,in the county of Suffolk, State of Massachusetts, have invented certainnew and useful Improvements in Stophlotions for Looms, of which thefollowing is a specification, reference being had to the accompanyingdrawings, forming part thereof.

This invention has reference to improvements in devices or stop motionsadapted to be brought into operation by or through the breaking of awarp thread or the undue slackening thereof to effect the stopping ofthe loom.

The main object of the invention is to so construct a warp stop motionfor looms that the same may be simplified largely through theelimination of feeler devices.

Another object of the invention is, in warp stop motions of thischaracter, to provide a mechanism which shall be absolutely positive inaction to release the shipper arm preferably on the backward movement ofthe lay from the breast beam.

The invention consists in such novel features of construction andcombination of parts as shall hereinafter be more fully described andpointed out in the claims.

Figure 1, represents an end view partly broken away and shown in sectionof a loom illustrating my new invention. Fig. 2, represents a back viewof portions of the same partly broken away. Fig. 3, represents detailsof construction of the same taken on line 3-3 Fig. 2 looking in thedirection indicated by the arrows of said line. Fig. 4, represents anenlarged detail view of parts shown in Fig. 2.

Similar reference characters designate corresponding parts throughout.

As shown in the drawings 5 and 6 represent end frames of a loom havingthe usual lay 7 mounted on the pivoted swords 8, 8 and operated in theusual manner by mechanisms cont-rolled to some extent by the ordinaryshipper arm 9 mounted on the frame (3 or on any other part of the loomand adapted, when released from its detaining device 10, to move in adirection to effect the stopping of the loom by or through any of thewell known mechanisms ordinarily used for that purpose. In the presentinstance the lay 7 is furnished with the striker plate 11 the purpose ofwhich will hereafter be described. Journaled in the end framesSpecification of Letters Patent.

Application filed November 14, 1912.

Patented July 15, 1913.

Serial No. 731,290.

5 and 6 is the shaft 12 having the cam 13 through which motion istransmitted to the rod 14 in the usual manner of cam actuated rods.

Mounted on the respective frames 5 and 6 or on the brackets extendingtherefrom are the supports 15 and 16 on which are carried one or morelongitudinally grooved bars as 17 having transverse slots at the openedge of said groove to form the teeth 18, 1S and slidable in thelongitudinal groove of each of said bars as 17 is a strip 19 notched atits upper edge to form the teeth 20, 20 corresponding to the teeth 18,18 of said bar 17.

'Journaled in bearings of the support 16 is the shaft 21 having fixedthereto the spring fingers 22, 22 and the arm 23 which latter isconnected with and actuated by the rod 14 to effect the vibratorymovement of said arm 23, its shaft 21 and the spring fingers 22, 22. Onsaid shaft 21 isloosely mounted the vibrator 24 having the member 25,engaged between the spring fingers 22, 22 andhaving the depending arm26. This vibrator 24 is connected with the toothed strip or strips 19 sothat under the normal operation of the loom the actuation of the rod 14effects the vibration of vibrator 2 1, through the fingers 22, 22 andthe sliding back and forth of the strips 19 in the grooves of said bars17 while if the move ment of said bars 19 is arrested the arm 23 canstill vibrate because of the yielding of fingers 22, 22 withouteffecting the vibration of vibrator 24 and its depending arm 26.

In order to effect the movement of the shipper arm or lever 9 to therelease position when the movement of the strip 19 is arrested I connectthe vibrator arm 26 by the rod 27 with one end of the bell crank 28which is pivotally mounted on the frame 6, or some other fixed part ofthe loom. One arm of said bell crank 28 is perforated and in one of theperforations is slidabl-e the rod 29 having the inverted L shaped arm 30adjustably secured thereon while the end of this rod 29 is pivotallyconnected with the knock off 31 pivotally mounted on a stud extendingfrom the frame 6 and having the lateral projection 32 so engaged withthe shipper arm 9 that when the knock off 31 is moved against the actionof its retraction spring 33 the projection 32 will effect the releasemovement of the shipper arm 9 from its detaining device whereupon saidshipper arm, so released, can move to the loom stopping position.

Provision is made for arresting the movement of the slide strip 19 whena Warp thread breaks as follows: Each warp thread is supplied with adrop wire (Z, so called, which consists of a thin strip of steel havingthe slot 8 to receive both the bar 17 and the slide strip 19 and isfurnished with means for engaging a Warp thread. Under the normaloperation of the loom these drop wires (Z are sustained by the unbrokenwarp threads, as 'w, to, out of engagement with the teeth 18 and 29 ofthe bar 17 and slide 19. lVhen, now, a warp thread breaks or becomesunduly slack its drop wire (Z moves downward until the upper end of itsslot 3, ultimately, enters the slots between the teeth 18, and 20respectively of the bar 17 and the slide 19, the movement of the slide19 and of the vibrator arm 26 is arrested whereby the swinging ot' thebell crank lever 28 ceases and the bent end 30 of the arm 30 remains inthe path of the striker plate 11 on the lay 7, which, when the lay movesback strikes said end 30 of arm 30 and moves rod29 in a direction toactuate the knock off 31 to knock off or release the shipper arm 9 fromits detaining device to permit said shipper arm to move to the loomstopping position.

During the normal operation of the loom the slidable rod 29 ispreferably raised at one backward movement of the lay T and lowered atthe next. similar movement of said lay and the L shape of the arm 30permits the edge of the striker plate 11 to move above and below the endof the bent end. 30 of said arm 30. Under abnormal conditions, however,rod 29 is so arrested that said bent end 30 is in the path of thestriker plate 11 and, hence, when so positioned will be struck by saidstriker plate 11 at the next backward movement of the lay to effect thesliding of rod 29 and the release of the shipper lever as abovedescribed.

It is of course obvious that in different makes of looms the knock offmechanism will be modified in construction to accommodate it to theconstruction of the machine and the location and direction of movementof the shipper lever or device.

Having thus described my invention I claim as new and desire to secureby Letters Patent.

1. A stop mot-ion for looms comprising a guide bar having teeth at itsupper edge, a toothed slide carried by said guide, a vib "t tor for saidslide having a depending arm, a bell crank actuated by said arm andhaving a guide, a rod slidable in said guide and having a stop armadapted to be located in the path of a moving part of the loom underabnormal conditions, and a knock OH? connected with said slidable rod.

2. A stop motion for looms comprising a guide bar having a longitudinalgroove hav ing a toothed edge, a strip slidable in said groove andhaving a toothed edge, means for vibrating said strip under normalconditions, means to arrest the movement of said strip under abnormalconditions, a bell crank connected with said vibrating means and havingone of its arms perforated, a rod slidable in said perforation, andhaving an adjustable L shaped arm adapted to be struck by a part on thelay when the vibration of said rod is arrested, a knock off pivotallymounted on the machine and connected with said rod, a shipper armadapted to be moved to the release position by said knock off, a springfor retracting said knock 011', and a lay movably mounted and having astriker plate, substantially as described.

ARTHUR KEAN. lVitnesses I'IENRY J. MILLER, ESTHER G. MURPHY.

Copies of this patent may be obtained for five cents each, by addressingthe, Commissioner of Patents, Washington, D. C.

